摘要
出租车计费器一般采用以单片机为核心的设计方法,设计不够灵活方便。为此,在此介绍了采用EDA技术的层次化设计方法设计出租车计费器的方法。即用VHDL编写各个功能模块,实现低层设计;用原理图输入方式描述各模块间的关系,实现顶层设计。采用FPGA可编程逻辑器件为系统控制单元,无需添加外围电路,更新功能仅需修改软件。实验表明,该设计方法简单快捷,所设计的系统性能可靠。应用该方法设计的数字电子系统具有很强的灵活性。
MCU is generally taken as a core component for design of taximeter.The method is not flexible to some extent.Therefore,a design method of Taximeter based on EDA top-to-down layering method is introduced in this paper.Each functional module is compiled with VHDL to realize the low level design and schematic diagram input mode is adopted to describe the relation among various modules to realize the top level design.The designed control unit of the new type of taximeter is based on FPGA,and no peripheral circuit is need.Functions can be updated by modifying the software only.The example is tested and verified.The result shows that the method is efficient and reliable.Besides,designed digital system has high flexibility.
出处
《现代电子技术》
2011年第16期23-24,30,共3页
Modern Electronics Technique
